Folding mechanism



May 5, 1925. 1,536,581

= J. J. HALLIWELL FOLDING MECHANISM Filed Jan. 15, 192 3 Sheets-Sheet 1 J. J. 'HALLIWELL FOLDING MECHANI SH Fil e d Jan. 15, 1923 3 Sheets-Sheet 2 lNVE-NTOR hlex/ g 2 M Z .1. m o J1 m.

AT-FY May 5, 1925 15351581 J. J. HALLIWELL FOLDING MECHANISM Filed Jan. 15, 1933 3 Sheets-Sheet 5 INVENTOR.

Patented May 5, 1925 ESE JOH FT J'. HALLIWELL, OF MOUNT VERNON, NEW" YORK, ASSIGNOR TO'IR'HGE AND (16:, OF NEW YORKjNi Y., A CORPO'RATZUN OF NEWYORK.

FOLDING MECHANISDL Application filed January 15, 1923.' Serial No. 612,582.

connection with high speed printingmw chines, difiiculty has been experienced in getting the fold on the center line of the-prod= not at different folder speeds. These folding cylinders are equipped with sheet taking devices, usually pins, by which the head of the sheet or web is taken. The cylinders are also equipped with a folding or tucking blade which is projected from the cylinder at proper intervals to fold off a sheet into cooperating-folding devices, usually a pair of rolls. As the sheet is advanced it becomes necessary to free the sheet from the pins sons to avoid tearing when the sheet.

is tucked intothe rolls Betweenthe time the sheet is released and the time the sheet is tucked into the rolls the action of theblade on the sheet -at=the start of the tuck is apt to cause a slip of the sheet on the'cylinders, which results in the sheet being gfolded on a line off center, this beingparticularly apt to occur at slow speeds, such as when starting.

It is the especialobject of the-present invention to produce a folder construction in which thisslip of the sheet is prevented between the time the-sheet is released by the sheet takingdevices on the cylinder and the accomplishing this, and one which can be readily added to folding mechanisms already constructed.

With these and objects not specifically referred to, the invention consists in certain iii-g cylinder and cutting mechanism.

novel parts, arrangements, and combinations, a detailed description of which will be given 1n connectronwrth the accempanyingdrawings, and the novel features pointed out in-the claims hereunto annexed.

In these drawings.

Figure 1 is a sectional end view, partly broken away, of a folding cylinder and associated mechanism illustrating one construction for carrying out the invention.

Figure 2 is a similar view with the parts in a different position.

Figure 3 isa similar view with the parts in a still different position.

Figure 4 is a side view of the construction shown in F 3, looking in the direction of arrow 4 of that tigui'e.

Figure 5 is' a partial sectional end view illustrating a modified construction for carrying out the invention.

Figure 6 is a similar view showing the parts in a different position.

Figure 7 is a similar View showing the parts in a still different position.

Figure 8 is a detail partial end view showingthecam rolland an operatingcam; and

Figure 9 is a side view of the construction shown in Fig. 8.

Referringnow to these drawings which illustrate preferred embodiments of the invention, the nnproved folding mechanism has been illustrated as used incon-nection with a web from which sheets are severed and folded. This web, indicated by the letter W may come from a high speed printing machine not shown.

This web is forwarded to the folder by, forwarding rolls 1,2, indicated in Fig. 1. From these roll-s the web passes to the fold- In the particular construction shown the folding cylinder 3 co-operates wvith a cutting cylinder at to sever the web. into sheet-s. This cutting icylinder isprovided with a cutting knife 5 and the folding cylinder is provided with the cooperating.cutting .woods (3, the cylinder 4, in the construction shown, being half the diameter of the folding cylinder. 7

The folding cylinder is provided with sheet taking devices which seize the web and advance it. lVhile these sheet taking devices may be of various forms, in thepartic ular construction shown, they are pins 7, two sets of these pins being shown, mounted on lever arms 8 fast on shafts 9 rocked by a cam to project the pins and r tr ct hem to release the sheets,

The folding cylinder 3 is also equipped with a folding blade 11 which is mounted on a shaft 12 operated by a cam 13 to project and retract the blade at suitable times. (lo-operating with the blade 11 is a folding mechanism operating to fold off a sheet. This mechanism, in the particularconstruction shown is a pair of rolls 14, 15, preferably driven from the folding cylinder 3 by means of a gear 16 on the shaft 17 of the roll 15, this gear meshing with a gear 18 on the shaft of the folding cylinder, and driving the other roll by engaging a gear 19 on the shaft 20 thereof.

In accordance with the invention, means are provided for preventing the sheet from slipping on the cylinder after it has been released by the pins, the sheet being preferably positively held against the cylinder between the time of its release and the time the blade tucks it into the bite of the folding rolls. Various means may be employed for effecting this and two such means are illustrated in the drawings. Referring first to Figures 1 to 4, there is shown a presser member having a raised portion which engages the sheet at the desired time to press it against the cylinder. While the construction of this presser member may be some what varied, as shown it consists of a plu rality of spaced rolls 21 mounted on a shaft 22 suitably journaled in side frames 23. Each of the disks 21 has a raised portion 24 on its periphery and the shaft 22 is preferably spring seated as at 25, so that a surface contact between the raised portions of the rolls and the cylinder is ensured. This shaft is driven at the speed of the folding cylinder by means of a gear 26 meshing with a gear 26 on the folding cylinder shaft.

In Fig. 1 the web is shown forwarded by the pins at a point slightly in the rear of Where the pins release the sheet, and the raised portions of the disks are about to come into contact with the web. This contact has been made in the position shown in Fig. 2, and the pins having released the sheet the pressure contact prevents the sheet from slipping on the cylinder. In this position the folding blade is about to come into action and the sheet has been severed from the web. In Fig. 3 the folding blade has tucked the sheet into the bite of the folding rolls, and the raised portions of the disks are about to have contact so that the sheet will be free to be drawn off by the rolls. Vith this construction the sheet is positively held in correct position with respect to the blade and the fold is always made on a predetermined fold line.

In Figs. 5 to 9 a modification is shown for effecting the holding of the sheet against the cylinder gt the desired time.

In the structure here shown the presser member is in the form of spaced rolls, or disks 27, one of which is shown having a circular periphery, these disks being mount ed on a spring seated shaft 28, similar to the shaft 22, before referred to. On this shaft beyond the end of the folding cylinder is an actuating roll 29 arranged to contact with a. cam plate 30 on the end of the folding cylinder, this cam plate having two spaced raised portions 31, 32, as shown in Fig. 8, each of these raised portions having front and rear inclined surfaces 33, 3 1, and 35, 36. In this construction the roll 29 riding up the incline 33 of the raised portion 31 acts to move the shaft 28 and rolls 27 away from contact with the cylinder 3, so that the leading edge of the web and the pins holding it may pass freely between the rolls and the cylinder. vances the roll 29 rides off the raised portion 31 and thus permits the rolls 27 to press the web against the cylinder and hold it from any slipping after the pins have been withdrawn. As the blade tucks the sheet into the folding rolls, the roll 29 rides up the incline 35 of the raised portion 32, and actuates the rolls 27 so as to leave the sheet free to be folded off.

IVhile the invention has been shown and described in its preferred forms, it will be understood that various changes may be made in the specific structures disclosed without departing from the invention.

What I claim is:

1. The combination of a folding cylinder having sheet taking devices and a folding blade, folding devices co-operating therewith to fold ofi a sheet, and pressure devices acting to hold the sheet and prevent it from slipping on the cylinder between the time the sheet taking devices release the sheet and the time the blade tucks the sheet into the co-operating folding devices.

2. The combinaion of a folding cylinder having sheet taking devices and a folding blade, folding devices co-operating therewith to fold off a sheet, and rotary pressure devices acting to hold the sheet against the cylinder between the time the sheet taking devices release the sheet and the time the blade tucks the sheet into the co-operating folding devices.

3. The combination of a folding cylinder having sheet taking devices and a folding blade, folding devices cooperating there with to fold off a sheet, and a presser roll arranged to press the sheet against the cylinder between the time sheet taking devices release the sheet and the time the blade tucks the sheet into the co-operating folding devices.

d. The combination of a folding cylinder having sheet taking devices and a folding blade, folding devices (Bo-operating there- As the sheet adtill with to fold off a sheet, and means for preventing movement of the sheet relatively to the cylinder between the time the sheet taking dev'ces release the sheet and the ime the blade tucks the sheet into the ccopcrating folding devices.

The combination of a folding cylinder having sheet-taking devices and a folding blade. folding devices eo-ope'ating then with to fold otl' a sheet, a prcsser roll, and a raised portion on one of the parts oper ating to cause a pressure between the parts which ranse a sheet to be held against the cylinder between the time the sheet-taking devices release the sheet and the time the blade tracks the sheet into the cooperating folding devices.

(3. The combination of a folding eylinder having sheet taking pins and a folding blade, :1 pair of folding rolls into which a sheet is folded oil by the blade, and a roll rotating at the cyiir 'lcr iced and timed to hold the sheet against the cylinder between the time the sheet halting devices release the sheet and the time the blade tacks the sheet into the bite of the rolls.

1'. The combination with w h forwarding devices, of a folding cylinder having sheet tithing devices and a folding l;=lade, a cooperating cutting cylinder, a pair of folding rolls into whi-h a sheet is folded off by the blade, and a roll rotating at cylin dcr speed a id timed to hold a cut sheet against the cylinder between the time the sheet taking devices release the sheet and the time the blade tucks the sheet into the cooperating folding devices.

8. The combination of a folding cylinder having sheet taking dc 'ices and a folding blade, folding devices co-operating therewith to fold otl' a sheet, and spring seated pressure devices actin to press the sheet against the cylinder after it has been released from the sheet taking devices.

9. The combination of a folding cylinder having sheet taking de ices and a folding blade, folding devices c i -operating there with to fold oil a sheet, a pressure roll acting to press the sheet against the cylinder after it has been released from the sheet taking devices, and a spring seated shaft for the roll.

it). The combination of a folding cylinder ha ing sheet taking devices and a folding blade, folding devices (o-operating therewith to fold off a sheet, a pressure roll adjacent the cylinder, and acting to press the sheet against the cylinder after it has been released from the sheet taking devices, a spring seated shaft for the rolls. and gear connections betneen the shaft and the cylinder.

11. In a rotary folding mechanism, the combina ion of a folding cylinder and fold Eng rolls of means for holding a sheet to be folded in contact with the folding cylinder until after the sheet is passed into the nip of the folding rolls.

12. In a rotary folding machine. the combination of a folding cylinder, folding rolls. ind a prcsser roll for holding a sheet to )t folded in contact with the cylinder until after he sheet is passed into the nip of the folding rolls.

in testimony whereof, I have hereunto set my hand.

JOHN J. HA LLUVELL. 

